Thread clampinq mechanism for looms



July 6 1926. Re. 16,376

A. C. VARNUM AL THREAD CLAIPING IEGHARISI F01! LOOIS Original FiledMarch 10. 1922 JWRYW 1122;".

1; securely and. efi eettvelj .clanijpini 'eiihe'r the ihre d be" A lledt. of imfi mochanism applied thereto;

* s-Bqf u sshuttle box 2, is adapted to e h a m nner y a y showni= Aporti on-oi th am A shuttle I Reissued July a, 1926.

invention relates to automatie'filling replenishing looms-andbasparticular referof the type in which meaifi ii are providedinrpeirting the threads o ling w are be e'ected upon filling replenshment at points; jacent the shuttle iedge of cloth, so. that .IooseendsX caugbtand'wqven' into or be left hanging to interfere In laonis of eabove described, e, it has been-heretofore customary to p a r iithe adacent to the shuttle by athread mountedion a swinging 'member, whichmember may servev as a shuttle feeler, thelhto. the thread ad' cento'the edge of the 0th by a temple't rea bi te Theogiect oi v a:pg'hovlds 1 y it e rea 'ent-to sliiittle ,or coarse int SQ-tbatthore W1bebntlittle oi ,.out of the clamp it thtehblggipilagbhfig e at; e p i s;fa. y temple thread. m gi emu ereinafter fullyappear, reference being.had Tfio he-swarm d i w n v ;T==Fig.: 1 isatransver'se fiectioglal Viewof a i o ofa loomhawiing our read clampview 'in side "imiiiil 7 2 is anenlar 15; etails of the tion showing the -l ngee ;o I.

is-a front view of the parts shown inFig gplan'view of the stationaryempingmember. i v .nLike referencecharacters refer to like as in. thediii'ei ent'fi'ggfes.

' e la 1,

suitable means} not e magazine o f'the ted at 31nd a rock shaft 4,

doom is. indies oitend'mg across the loom, is adapted to beturnedjri-theqdireotion of the arrow to operate theweft replenishi Vmechanism of the R ot un n ted on 6',-;-1s no y adapted to be maintainedin an inoperative A vW TH STAYIEZS 'llla'fia d m -Re. 16,37&

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position with respect to the lay 1 by means of a spring 7 acting throughan arm 8, and a lever 9 mounted on the rock shaft 4 is adapted to movethe feeler member in the directlon o'f the lay 1 upon operation of thefilling replenishin mechanism.

As best s own in Fig. 2, the upper end of the shuttle ifeeler 5 isrovided with a notch 10; to vreceive the filling thread when "the feeleris moved into 0 rative ositiofn with respect to the shuttle ox 2. fixedblade 11 is secured to the feeler 5 at the lower e e o'f the notch and amovable cutting blade 2 is pivotalltfi mounted on a stud 13 extendingthrough e feeler member 5. The movable blade 12 is provided with a heelportion 14. whichis adapted to be engaged by the lay 1 when the shuttlefeeler 5 is moved into its operative position, whereby the blade 12 isturned on the stud 13 to part the thread between the cooperating edgesof the blades 11 and 12. The movable blade 12 is further provided with apin 15, whereby the blade may be opened after partin the thread, as willbe hereinafter described: v

The parts of a loom described thus far represent a usual and well knownconstruction and therefore, form no part of our present invention which,as previously stated, resides in t e provision of improved means forclamping the filling thread as it is severed b the blades carried by theshuttle feeler. othis end a plate 16 isinounted on the shuttle feeler 5by the stud 13 and is held in close engagement with the movable blade 12by means ofa resilient member 17. As best shown vin Fig. 4, the plate 16is provided with an offset portion 18 located opposite to the stationaryblade 11. The portion 18 provides a space 18 within which is rotatablymounted a roller 19 on a 'n 20 extending between the walls of the 0 setportion 18. The roller 19 i '0'! such diameter that the movable cuttingH 12 is adapted to just engage the periphr of the roller when it ismoved d gma y to part and clamp the filling thread, as will now bedefeeler 5 into the operative position shown in Fig. 1, in which thecutting blades 11 and 12 are open and the heel 14 is in the path of aprojection 21 on the la. 1. As the latter completes its forward eatprojection 21 enga es the heel l4 and thereby turns the cutting lade 12about its ivot in the direction of the stationary bla e 11 and theroller 19. As the filling thread is parted by the edges of the blades 11and 12, it is also clamped between the blade 12 and the roller 19. Theclamping of the thread occurs without any'tendency for it to be severedby the blade 12, for the leason that the rotatably mounted roller 19turns slightly as the thread is jammed between the blade 12 and theperiphery of the roller 19, thereby effectively preventing severance ofthe thread. As the shuttle feeler 5 returns to its inoperative position,the parted thread is still tightly clamped, so that there is noossibility of its being woven into the cloth fore it is parted by thetemple thread cutter. After the temple thread cutter has operated topart the thread adjacent the cloth, the pin 15 on the heel 14 is adaptedto be engaged, by a suitable projection not shown, to turn the blade 121n a clockwise direction about its pivot, and thereby release thesevered thread.

From the foregoing, it is ap arent that we have provided an extreme yeffective means for clamping a filling thread as it is severed at apoint adjacent to the shuttle, and that our improved clamping meansadapted to secure hold either fine or coarse thread or yarn until it issevered by the tem le thread cutter at a point adjacent the cloth. Ourclamping mec anism is particularly advantageous when a filling feelerfork is employed between the temple thread cutter and the thread partingand clamping mechanism, for the reason that the thread cannot be readilydrawn from the clamp as it enga es the filling fork on the movement ofthe lling feeler. Furthermore, our im-' proved clamping mechanism is soconstructed that it is not liable to sever the thread at the point ofclamping, as in previous constructions, for the reason that the rollerturns slightly as the thread is wedged between the movable cutting bladeand the periphery of the roller. The fact that the thread isheld byrolling friction between the roll and an opposed surface allowsconsiderable force to be applied to the moveible blade for cuttingwithout danger of the impact severing the thread at the point ofclamping.

lVhile we have shown our improved clamping mechanism in connection witha particular form of filling feeler and thread parter, it is not solimited, but is capable of being ap lied to other loom constructionswithout eparting from the spirit and scope of our invention. We desiretherefore that only such limitations be imposed thereon as may comewithin the scope of the appended claims.

We claim:

1. In an automatic filling replenishing loom, the combination with athread parter to act upon the thread of the filling sup ly to beabandoned and comprising a mova 1e blade and a surface of'revolution, ofmeans for moving said blade to clamp the thread by rolling frictionbetween said blade and said surface of revolution.

2. In an automatic filling replenishing loom, the combination with athread parter to act u on the thread of the filling supply to be aandoned and comprising a b ade, of a freely rotatable member adapted forits movement in connection with said blade to clamp the thread betweenop osed surfaces of said blade and of said mem er, said blade androtatable member being relatively movable bodily.

3. In an automatic filling replenishing loom, the combination with athread parter to act upon the thread of the filling sup ly to beabandoned, and comprising a mova 1e blade, of a freely rotatable rollerhaving its axis parallel to the said blade, and dependent u on themovement of the blade to clamp the t read.

4. In an automatic filling replenishing loom, the combination with athread parter to act u on the thread of the filling su ply to be aandoned, and comprising a bl ade, of a relatively movable plate inengagement with said blade and carrying a freely rotatable roll with itsaxis parallel to said blade.

5. In an automatic filling replenishing loom, the combination with athread parter to act u on the thread of the filling su ply to be aandoned, and comprising a b ade, ofa plate in en gement with said bladeand carrying a reely rotatable roll with its axis para lel to saidblade, said plate and blade being relatively movable the said bladebeing substantially tangent to the surface of said roll.

6. In an automatic filling replenishing loom, the combination with athread parter to act upon the thread of the filling supply to beabandoned, and com rising a relatively movable blade and surface ofrevolution,

of means for causing a relative bodily move- 8.11: an automatic fillingreplenishing clamping the thread between them, one of loom, thecombination with a thread patter said elements bein slightly yieldin toact upon the thread of the filling supgl In testimony w ereof we haveereunto I to be abandoned, of two relatively mova e aflixed oursignatures.

elements each mounted on one part of the thread porter, one having aflat surface and ARTHUR C. VARNUM.

' the other a freely movable part thereon for 7 JAMES ERNEST BIRDSALL.

